Finding the Fourth Proportional to 128,175.99, 192,197.88 and 74,971.77
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Solution
The fourth proportional to 128,175.99, 192,197.88 and 74,971.77 is: 112,418.99
Step by Step Solution
- Step 1: Write the proportion equation
128,175.99 : 192,197.88 = 74,971.77 : x - Step 2: Convert to fraction form
128,175.99/192,197.88 = 74,971.77/x - Step 3: Cross multiply
128,175.99x = 192,197.88 × 74,971.77 - Step 4: Simplify right side
128,175.99x = 14,409,415,253.85 - Step 5: Solve for x
x = 14,409,415,253.85/128,175.99 - Step 6: Final answer
x = 112,418.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.